28011616 has 12 divisors (see below), whose sum is σ = 55147932. Its totient is φ = 14005792.

The previous prime is 28011611. The next prime is 28011629. The reversal of 28011616 is 61611082.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28011611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 437650 + ... + 437713.

It is an arithmetic number, because the mean of its divisors is an integer number (4595661).

Almost surely, 2^28011616 is an apocalyptic number.

It is an amenable number.

28011616 is a deficient number, since it is larger than the sum of its proper divisors (27136316).

28011616 is an equidigital number, since it uses as much as digits as its factorization.

28011616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 875373 (or 875365 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 25.

The square root of 28011616 is about 5292.6001171447. The cubic root of 28011616 is about 303.7008830696.

Adding to 28011616 its reverse (61611082), we get a palindrome (89622698).

The spelling of 28011616 in words is "twenty-eight million, eleven thousand, six hundred sixteen".